Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
  • C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
  • C07D207/30—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members
  • C07D207/32—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
  • C07D207/33—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms with substituted hydrocarbon radicals, directly attached to ring carbon atoms
  • C07D207/337—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
  • A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
  • A01N43/04—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom
  • A01N43/06—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom five-membered rings
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
  • A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
  • A01N43/36—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom five-membered rings
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
  • A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
  • A01N43/36—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom five-membered rings
  • A01N43/38—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom five-membered rings condensed with carbocyclic rings
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
  • A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
  • A01N43/58—1,2-Diazines; Hydrogenated 1,2-diazines
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
  • C07D209/02—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
  • C07D209/04—Indoles; Hydrogenated indoles
  • C07D209/10—Indoles; Hydrogenated indoles with substituted hydrocarbon radicals attached to carbon atoms of the hetero ring
  • C07D209/18—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
  • C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
  • C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
  • C07D307/38—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with substituted hydrocarbon radicals attached to ring carbon atoms
  • C07D307/54—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
  • C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
  • C07D307/78—Benzo [b] furans; Hydrogenated benzo [b] furans
  • C07D307/79—Benzo [b] furans; Hydrogenated benzo [b] furans with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the hetero ring
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
  • C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
  • C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
  • C07D333/06—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring carbon atoms
  • C07D333/24—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
  • C07D333/50—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom condensed with carbocyclic rings or ring systems
  • C07D333/52—Benzo[b]thiophenes; Hydrogenated benzo[b]thiophenes
  • C07D333/54—Benzo[b]thiophenes; Hydrogenated benzo[b]thiophenes with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the hetero ring
  • C07D333/60—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals

Definitions

• This invention relates to derivatives of acrylic acid useful in agriculture (especially as fungicides but also as insecticides and plant growth regulators), to processes for preparing them, to agricultural (especially fungicidal) compositions containing them, and to methods of using them to combat fungi, especially fungal infections in plants, to kill insect pests and to regulate plant growth.
• the invention provides a compound having the general formula (I): ##STR2## and stereoisomers thereof, wherein W is R 1 O 2 C--C ⁇ CH--ZR 2 , wherein R 1 and R 2 , which are the same or different, are alkyl or fluoroalkyl groups, and Z is either an oxygen or sulphur atom; A is an oxygen or sulphur atom, --NR 3 --, or --CR 4 R 5 --; X, Y and Z 1 , which are the same or different, are hydrogen or halogen atoms, or hydroxy, optionally substituted alkyl, optionally substituted cycloalkyl, optionally substituted cycloalkylalkyl, optionally substituted aralkyl, optionally substituted heteroarylalkyl, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxyalkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted aryl, optionally substitute
• the compounds of the invention contain at least one carbon-carbon double bond, and are sometimes obtained in the form of mixtures of geometric isomers. However, these mixtures can be separated into individual isomers, and this invention embraces such isomers, and mixtures thereof in all proportions, including those which consist substantially of the (Z)-isomer and those which consist substantially of the (E)-isomer.
• one isomer is more active fungicidally than the other, the more active isomer being the one in which the group --ZR 2 on the W substituent (R 1 O 2 C--C ⁇ CH--ZR 2 ) is on the same side of the double bond as the 5-membered ring.
• This isomer is the (E)-isomer for all compounds of the invention except the thiophene compounds wherein the group W is at the 2-position of the ring, in which case this isomer is the (Z)-isomer.
• These isomers form a preferred embodiment of the invention.
• alkyl groups and the alkyl moiety of alkoxy groups can be in the form of straight or branched chains and preferably contain 1 to 6 carbon atoms, more preferably 1 to 4 carbon atoms. Examples are methyl, ethyl, propyl (n- and iso-propyl) and butyl (n-, sec-, iso- and tert-butyl).
• Optional substituents of alkyl include hydroxy, halogen (especially chlorine or fluorine), and alkoxycarbonyl. Trifluoromethyl is an optionally substituted alkyl group of particular interest.
• R 1 and R 2 which are alkyl or fluoroalkyl groups, are preferably both methyl.
• Fluoroalkyl groups are preferably fluoromethyl containing one, two or three fluorine atoms.
• Cycloalkyl which is preferably C 3-6 cycloalkyl, includes cyclohexyl and cycloalkylalkyl, which is preferably C 3-6 cycloalkyl(C 1-4 )alkyl, includes cyclopropylethyl.
• Optional substituents include halogen (especially fluorine or chlorine), hydroxy and C 1-4 alkoxy.
• Aralkyl includes, particularly, phenylalkyl (especially benzyl, phenylethyl, phenylpropyl, phenylbutyl or phenylhexyl) in which the alkyl moiety may carry other substituents such as hydroxy and the aryl moiety may be substituted with, for example, one or more of the following; halogen, hydroxy, C 1-4 alkyl (especially methyl and ethyl), C 1-4 alkoxy (especially methoxy), halo(C 1-4 ) alkyl (especially trifluoromethyl), halo(C 1-4 )alkoxy (especially trifluoromethoxy), C 1-4 alkylthio (especially methylthio), C 1-4 alkoxy(C 1-4 )alkyl, C 3-6 cycloalkyl, C 3-6 cycloalkyl(C 1-4 )alkyl, aryl (especially phenyl), aryloxy (especially phenyloxy
• Aryloxyalkyl includes, in particular, phenoxyalkyl (especially phenoxymethyl or phenoxyethyl) in which the alkyl moiety may carry other substituents such as hydroxy and the aryl moiety may be substituted in the same way as the aryl moiety in aralkyl above.
• Heteroarylalkyl and heteroaryloxyalkyl mean alkyl (preferably C 1-4 alkyl and especially ethyl in the case of heteroarylalkyl and methyl in the case of heteroaryloxyalkyl) carrying a heteroaromatic substituent (linked by an oxygen atom in the case of heteroaryloxyalkyl) which includes pyridinyl, pyrimidinyl, thienyl, furyl and pyrrolyl.
• heteroaromatic moiety is optionally substituted in the same way as the aryl moiety in aralkyl above, and particularly by trifluoromethyl, halogen (especially fluorine, chlorine or bromine), nitro, C 1-4 alkyl, C 1-4 alkoxy, trifluoromethoxy and amino.
• Alkenyl and alkynyl groups preferably contain 2 to 6 carbon atoms and, more preferably, 2 to 4 carbon atoms in the form of straight or branched chains.
• Ethenyl, propenyl and butenyl are examples of alkenyl groups.
• Optional substituents of alkenyl include aromatic and heteroaromatic groups (such as phenyl, furyl, thienyl or pyridyl) which may themselves carry substituents such as those carried by the aryl moiety in aralkyl above, particularly halogen (especially chlorine or fluorine).
• aromatic and heteroaromatic groups such as phenyl, furyl, thienyl or pyridyl
• substituents such as those carried by the aryl moiety in aralkyl above, particularly halogen (especially chlorine or fluorine).
• halogen especially chlorine or fluorine
• Alkynyl includes ethynyl and is optionally substituted by, for example, aryl which may itself be substituted in the same way as the aryl moiety in aralkyl above. Of particular interest is phenylethynyl.
• Aryl is preferably phenyl; heteroaryl includes heteroaromatic groups such as pyridinyl, pyrimidinyl, pyrazinyl, pyridazinyl, 1,2,3-, 1,2,4-, and 1,3,5-triazinyl, 1,2,4,5-tetrazinyl, thienyl, quinolinyl, isoquinolinyl, quinoxalinyl and benzothiophenyl; either may be substituted in the same way as the aryl moiety in aralkyl above.
• heteroaryl includes heteroaromatic groups such as pyridinyl, pyrimidinyl, pyrazinyl, pyridazinyl, 1,2,3-, 1,2,4-, and 1,3,5-triazinyl, 1,2,4,5-tetrazinyl, thienyl, quinolinyl, isoquinolinyl, quinoxalinyl and benzothiophenyl; either may
• Alkoxy is preferably C 1-4 alkoxy and optionally substituted with, for example, hydroxy, halogen (especially chlorine or fluorine) and C 1-4 alkoxy.
• Arylalkoxy includes phenyl(C 1-4 )alkoxy (especially benzyloxy).
• Aryloxy includes phenyloxy and heteroaryloxy includes pyridinyl- and pyrimidinyl-oxy.
• Acyloxy includes acetyloxy and benzoyloxy.
• Optionally substituted amino and acylamino include the groups -NR'R" and -NHCOR' in which R' and R" are as defined above.
• Acylamino includes benzoylamino and furoylamino optionally substituted by, for example, N--(C 1-4 )alkyl (especially N-methyl).
• the group --COR 9 includes, in particular, formyl, acetyl and optionally substituted benzoyl and the group --CR ⁇ NOR 10 includes the oxime ether --CH ⁇ N.OCH 3 .
• Arylazo is, for example, phenylazo in which the aryl moiety is optionally substituted in the same way as the aryl moiety in aralkyl above and particularly by alkynyl, alkoxy (especially methoxy) or dialkylamino (especially dimethylamino).
• optional substituents include those which can be present in the aryl moiety of aralkyl as described above.
• X, Y and Z are selected from the group consisting of hydrogen, halogen, C 1-4 alkyl, (especially methyl), aryl(C 1-4 )alkyl (especially benzyl, phenylethyl and phenyl n-propyl in which the phenyl ring is optionally substituted with, for example, halogen or nitro), acyl (especially formyl and benzoyl optionally substituted with, for example, halogen), heteroaryl(C 1-4 )alkyl, heteroaryloxy(C 1-4 )alkyl and heteroaryloxy in which the heteroaryl group is, for instance, pyridinyl, pyrimidinyl, pyridazinyl, pyrrolyl, furyl and particularly thienyl (examples are thienylethyl, thienyloxymethyl and pyridinyloxy), aryl
• These compounds include those in which two of X, Y and Z 1 are hydrogen. It is preferred, though, that a group other than hydrogen is in a position on the heterocyclic ring adjacent to the substituent W. In the case when A is --NR 3 --, this group may be R 3 When X and Y are in adjacent positions on the heterocyclic ring they may join to form a fused ring such as a fused benzene ring.
• R 1 and R 2 are methyl, more preferably R 2 , and even more preferably, both.
• A is sulphur or --NR 3 --.
• the compound (IA) ##STR6## preferably the (Z)-isomer when the acrylate group is in the 2-position, wherein X, which is in a position adjacent to the acrylate group, is halogen, C 1-4 alkyl, halo(C 1-4 )alkyl (especially halomethyl), aryl(C 1-4 )alkyl (especially benzyl, phenylethyl and phenyl n-propyl) aryloxy(C 1-4 )alkyl (especially phenyloxyalkyl), aryl-(C 2-4 )alkenyl (especially phenylethenyl), aryloxy (especially phenyloxy), acyl (especially formyl and benzoyl) and Y and Z 1 have any of the values previously defined for them but are preferably both hydrogen.
• X which is in a position adjacent to the acrylate group, is halogen, C 1-4 alkyl, halo(C 1-4
• R 3 is hydrogen, C 1-4 alkyl (especially methyl or ethyl) or aryl(C 1-4 )alkyl (especially benzyl, phenylethyl and phenyl n-propyl);
• X is hydrogen, C 1-4 alkyl (especially methyl), aryl(C 1-4 )alkyl (especially benzyl, phenylethyl and phenyl n-propyl), aryl(C 2-4 )alkenyl (especially phenylethenyl), or acyl (especially formyl); and
• Y and Z 1 have any of the values previously defined for them, but are preferably both hydrogen; or when X is hydrogen Y and Z 1 together form a fused benzene ring.
• the compounds of the invention of formula (I) may be prepared by the steps shown in Schemes I to IV.
• R 1 , R 2 , X, Y, Z, Z 1 , W and A are as defined above
• L is a halogen (iodine, bromine or chlorine)
• M is a metal (such as lithium) or a metal plus an associated halogen (such as MgI, MgBr or MgCl)
• R 13 is hydrogen or a metal (such as sodium)
• R 14 is alkyl and R 15 is alkyl or optionally substituted aryl.
• Each of the transformations shown in Schemes I to IV is performed at a suitable temperature and usually in a suitable solvent.
• the compounds of formula (I) may exist as mixtures of geometric isomers which can be separated by chromatography, distillation or fractional crystallisation.
• the use of the formula: ##STR24## is intended to signify a separable mixture of both geometric isomers about the acrylate double bond, i.e.: ##STR25##
• compounds of formula (I) can be prepared by treatment of ketoesters of formula (II) with phosphoranes of formula (VI) in a convenient solvent such as diethyl ether (see, for example, EP-A-0044448 and EP-A0178826.
• Compounds of formula (I) wherein Z is sulphur may also be prepared by treating ketoesters of formula (II) with lithio-species of formula (CH 3 ) 3 SiCH(Li)SR 2 (see, for example, D J Peterson, J. Org. Chem., 1968, 33, 780 and F. A. Carey and A. S. Court, J. Org. Chem., 1972, 37, 939).
• Ketoesters of formula (II) can be prepared by treatment of metallated species (III) with an oxalate (VII) in a suitable solvent such as diethyl ether or tetrahydrofuran.
• a suitable solvent such as diethyl ether or tetrahydrofuran.
• the preferred method often involves slow addition of a solution of the metallated species (III) to a stirred solution of an excess of the oxalate (VII) (see, for example, L. M. Weinstock, R. B. Currie and A. V. Lovell, Synthetic Communications, 1981, 11, 943, and references therein).
• the metallated species (III) in which M is MgI, MgBr or MgCl can be prepared by standard methods from the corresponding halides (IV) in which L is I, Br or Cl respectively.
• the metallated species (III) in which M is lithium can be prepared by standard methods by treatment of the corresponding halides (IV) with an organo-lithimm reagent such as n-butyl-lithium.
• the metallated species (III) wherein A is oxygen, sulphur or NR 3 in which M is a lithium atom at the 2- or 5-position can also be prepared by direct lithiation of compounds (V) using a strong lithium base such as -n-butyl-lithium or lithium diisopropylamide (see, for example, H. W. Gschwend and H. R. Rodriguez, Organic Reactions, 1979, 26, 1). ##STR26##
• ketoesters of formula (II) can be prepared from compounds of formula (V) by treatment with acid chlorides of formula (VIII) in a suitable solvent (such as chloroform) optionally in the presence of a Lewis acid (such as aluminium chloride or boron trifluoride).
• a suitable solvent such as chloroform
• a Lewis acid such as aluminium chloride or boron trifluoride
• ketoesters of formula (II) can be prepared by treatment of compounds of formula (V) with oxalyl chloride, optionally in the presence of a Lewis acid, followed by treatment of the resulting acid chloride with an alcohol of formula R 1 OH, wherein R 1 is as defined above, optionally in the presence of a base such as triethylamine.
• the intermediate acid chloride may be isolated.
• Acylations of the kind described above that is, acylations of thiophenes, pyrroles or furans with alkyl oxalyl chlorides or with oxalyl chloride, are generally regioselective.
• the patterns of regioselectivity follow those described in the chemical literature for acylations of these ring systems with a variety of acid chloride (see, for example, Comprehensive Heterocyclic Chemistry, A. R. Katritzky and C. W. Rees, Editors, Volume 4, Pergamon Press, 1984), and depend on the position or positions and type of substituents, if any, on the thiophene, pyrrole or furan ring undergoing acylation.
• Acylation is generally preferred at the 2- or the 5-positions (when one or both of these positions is unsubstituted), although particular substituents, such as benzenesulphonyl- or tri-isopropyl- silyl-groups, on the nitrogen of pyrrole can direct acylation mainly to the 3- or 4-position of the ring.
• substituents at the 3-position of a thiophene, pyrrole or furan ring direct acylation preferentially to the 2-position (as opposed to the 5-position) of the ring, and examples of such substituents are (E)-styryl, phenoxymethyl- and CH 3 O 2 C--C ⁇ CH--OCH 3 groups.
• ketoesters of formula (II) are described in the chemical literature (see, for example, D. C. Atkinson, K. E. Godfrey, B. Meek, J. F. Saville and M. R. Stillings, J. Med. Chem., 1983, 26, 1353; D. Horne, J. Gaudino and W. J. Thompson, Tetrahedron Lett., 1984, 25, 3529; and G. P. Axiotis, Tetrahedron Lett., 1981, 22, 1509).
• R 13 is hydrogen or a metal (preferably an alkali metal such as sodium or potassium) and R 14 is an alkyl group.
• Compounds of formula (I, Z is oxygen) can be prepared by treatment of compounds of formula (IX) with a base (such as sodium hydride or a sodium alkoxide of formula R 1 ONa, wherein R 1 is as defined above) and a formic ester of formula HCO 2 R 1 , wherein R 1 is as defined above. If a species of formula R2Q, wherein Q is a leaving group such as a halide (chloride, bromide or iodide), a R 2 SO 4 -anion, or a sulphonyloxy-anion, and R 2 is as defined above, is then added to the reaction mixture, compounds of formula (I, Z is oxygen) may be obtained. If a protic acid is added to the reaction mixture, compounds of formula (XIII) wherein R 13 is hydrogen are obtained. Alternatively, the species of formula (XIII) wherein R 13 is a metal may themselves be isolated from the reaction mixture.
• a base such as sodium hydride or a sodium alk
• compounds of formula (I, Z is oxygen) can be prepared from acetals of formula (X) by elimination of the elements of the alcohol R 2 OH, wherein R 2 is as defined above, under either acidic or basic conditions.
• reagents or reagent mixtures which can be used for this transformation are lithium di-isopropylamide; potassium hydrogen sulphate (see, for example, T. Yamada, H. Hagiwara and H. Uda, J. Chem. Soc., Chemical Communications, 1980, 838, and references therein); and triethylamine, often in the presence of a Lewis acid such as titanium tetrachloride (see, for example, K. Nsunda and L. Heresi, J. Chem. Soc., Chemical Communications, 1985, 1000).
• Acetals of formula (X) can be prepared by treatment of alkyl silyl ketene acetals of formula (XIV) wherein R 14 is an alkyl group, with a trialkyl orthoformate of formula (R 2 O) 3 CH, wherein R 2 is as defined above, in the presence of a Lewis acid such as titanium tetrachloride (see, for example, K. Saigo, M. Osaki and T. Mukaiyama, Chemistry Letters, 1976, 769).
• a Lewis acid such as titanium tetrachloride
• Alkyl silyl ketene acetals of formula (XIV) can be prepared from compounds of formula (IX) by treatment with a base and a trialkylsilyl halide of formula R 14 3 SiCl or R 14 3 SiBr, such as trimethylsilyl chloride, or a base (such as triethylamine) and a trialkylsilyl triflate of formula R 14 3 Si-OSO 2 CF 3 (see, for example, C. Ainsworth, F. Chen and Y. Kuo, J. Organometallic Chemistry, 1972, 46, 59).
• compounds of formula (I) may be prepared from compounds of formula (IX) in "one pot" by the successive addition of suitable reagents listed above.
• the compounds of formula (IX) can be prepared by standard methods described in the chemical literature.
• compounds of formula (I) can be made from acrylic acid derivatives of formula (XII) by successive treatment with bromine, a reagent of formula R 2 OM, wherein R2 and M are as defined above, and sodium hydrogen sulphate or a related chemical (see, for example, G Shaw and R N Warrener, Journal of the Chemical Society, 1958, 153, and references therein).
• the beta-sulphonyloxyacrylates (XVI) can be made from enols of formula (XIII, R 13 is hydrogen) using a sulphonyl chloride of formula R 15 SO 2 Cl, wherein R 15 is defined as above, usually in the presence of a base such as pyridine or triethylamine.
• the invention provides processes as hereindescribed for preparing the compounds of the invention and the intermediate chemicals of formulae (II) and (IX)-(XVII).
• Venturia inaequalis scab
• Plasmopara viticola on vines Other downy mildews such as Bremia lactucae on lettuce, Peronospora spp. on soybeans, tobacco, onions and other hosts and Pseudoperonospora humuli on hops and Pseudoperonospora cubensis on cucurbits Phytophthora infestans on potatoes and tomatoes and other Phytophthora spp. on vegetables, strawberries, avocado, pepper, ornamentals, tobacco, cocoa and other hosts.
• Thanatephorus cucumeris on rice and other Rhizoctonia species on various hosts such as wheat and barley, vegetables, cotton and turf.
• They may also have activity against various post-harvest diseases of fruit (e.g. Penicillium digitatum and italicum and Trichoderma viride on oranges and Gloesporium musarum on bananas).
• various post-harvest diseases of fruit e.g. Penicillium digitatum and italicum and Trichoderma viride on oranges and Gloesporium musarum on bananas.
• the compounds may be active as seed dressings against Fusarium spp., Septoria spp., Tilletia spp. (bunt, a seed borne disease of wheat), Ustilago spp., Helminthosporium spp. on cereals, Rhizoctonia solani on cotton and Pyricularia oryzae on rice.
• the compounds may move acropetally in the plant tissue. Moreover, the compounds may be volatile enough to be active in the vapour phase against fungi on the plant.
• the compounds may also be useful as industrial (as opposed to agricultural) fungicides, e.g. in the prevention of fungal attack on wood, hides, leather and especially paint films.
• some compounds may exhibit plant growth regulating activity and may be deployed for this purpose, at appropriate rates of application.
• the compounds may be used directly for fungicidal purposes but are more conveniently formulated into compositions using a carrier or diluent.
• the invention thus provides a fungicidal composition comprising a compound of general formula (I) as hereinbefore defined, and a fungicidally acceptable carrier or diluent.
• the invention also provides a method of combating fungi, which comprises applying to a plant, to seed of a plant, or to the locus of the plant or seed, a compound as hereinbefore defined, or a composition containing the same.
• the compounds can be applied in a number of ways. For example they can be applied, formulated or unformulated, directly to the foliage of a plant, to seeds or to other medium in which plants are growing or are to be planted. They can be sprayed on, dusted on or applied as a cream or paste formulation, or they can be applied as a vapour or as slow release granules. Application can be to any part of the plant including the foliage, stems, branches or roots, or to soil surrounding the roots, or to the seed before it is planted; or to the soil generally, to paddy water or to hydroponic culture systems. The invention compounds may also be injected into plants or sprayed onto vegetation using electrodynamic spraying techniques or other low volume methods.
• plant as used herein includes seedlings, bushes and trees. Furthermore, the fungicidal method of the invention includes preventative, protectant, prophylactic and eradicant treatment.
• compositions for dressing seed may include an agent (for example a mineral oil) for assisting the adhesion of the composition to the seed; alternatively the active ingredient can be formulated for seed dressing purposes using an organic solvent (for example N-methylpyrrolidone, propylene glycol or dimethylformamide).
• the compositions may also be in the form of wettable powders or water dispersible granules comprising wetting or dispersing agents to facilitate their dispersion in liquids.
• the powders and granules may also contain fillers and suspending agents.
• Emulsifiable concentrates or emulsions may be prepared by dissolving the active ingredient in an organic solvent optionally containing a wetting or emulsifying agent and then adding the mixture to water which may also contain a wetting or emulsifying agent.
• organic solvents are aromatic solvents such as alkylbenzenes and alkylnaphthalenes, ketones such as isophorone, cyclohexanone and methylcyclohexanone, chlorinated hydrocarbons such as chlorobenzene and trichlorethane, and alcohols such as furfuryl alcohol, butanol and glycol ethers.
• Suspension concentrates of largely insoluble solids may be prepared by ball or bead milling with a dispersing agent and including a suspending agent to stop the solid settling.
• compositions to be used as sprays may be in the form of aerosols wherein the formulation is held in a container under pressure in the presence of a propellant, e.g. fluorotrichloromethane or dichlorodifluoromethane.
• a propellant e.g. fluorotrichloromethane or dichlorodifluoromethane.
• the invention compounds can be mixed in the dry state with a pyrotechnic mixture to form a composition suitable for generating in enclosed spaces a smoke containing the compounds.
• the compounds may be used in a microencapsulated form. They may also be formulated in biodegradable polymeric formulations to obtain a slow, controlled release of the active substance.
• the different compositions can be better adapted for various utilities.
• the invention compounds can be used as mixtures with fertilisers (e.g. nitrogen-, potassium- or phosphorus-containing fertilisers).
• Compositions comprising only granules of fertiliser incorporating, for example coated with, the compound are preferred. Such granules suitably contain up to 25% by weight of the compound.
• the invention therefore also provides a fertiliser composition comprising a fertiliser and the compound of general formula (I) or a salt or metal complex thereof.
• Wettable powders, emulsifiable concentrates and suspension concentrates will normally contain surfactants e.g. a wetting agent, dispersing agent, emulsifying agent or suspending agent. These agents can be cationic, anionic or non-ionic agents.
• Suitable cationic agents are quaternary ammonium compounds, for example cetyltrimethylammonium bromide.
• Suitable anionic agents are soaps, salts of aliphatic monoesters of sulphuric acid (for example sodium lauryl sulphate), and salts of sulphonated aromatic compounds (for example sodium dodecylbenzenesulphonate, sodium, calcium or ammonium lignosulphonate, butylnaphthalene sulphonate, and a mixture of sodium diisopropyl- and triisopropyl-naphthalene sulphonates).
• compositions for use as aqueous dispersions or emulsions are generally supplied in the form of a concentrate containing a high proportion of the active ingredient, the concentrate being diluted with water before use.
• These concentrates should preferably be able to withstand storage for prolonged periods and after such storage be capable of dilution with water in order to form aqueous preparations which remain homogeneous for a sufficient time to enable them to be applied by conventional spray equipment.
• the concentrates may conveniently contain up to 95%, suitably 10-85%, for example 25-60%, by weight of the active ingredient. After dilution to form aqueous preparations, such preparations may contain varying amounts of the active ingredient depending upon the intended purpose, but an aqueous preparation containing 0.001% to 10% by weight of active ingredient may usually be used.
• compositions of this invention may contain other compounds having biological activity, e.g. compounds having similar or complementary fungicidal activity or plant possess plant growth regulating, herbicidal or insecticidal activity.
• a fungicidal compound which may be present in the composition of the invention may be one which is capable of combating ear diseases of cereals (e.g. wheat) such as Septoria, Gibberella and Helminthosporium spp., seed and soil borne diseases and downy and powdery mildews on grapes and powdery mildew and scab on apple etc.
• cereals e.g. wheat
• the composition can have a broader spectrum of activity than the compound of general formula (I) alone. Further the other fungicide can have a synergistic effect on the fungicidal activity of the compound of general formula (I).
• fungicidal compounds which may be included in the composition of the invention are carbendazim, benomyl, thiophanate-methyl, thiabendazole, fuberidazole, etridazole, dichlofluanid, cymoxanil, oxadixyl, ofurace, metalaxyl, furalaxyl, 4-chloro-N-(1-cyano-1-ethoxymethyl)benzamide, benalaxyl, fosetyl-aluminium, fenarimol, iprodione, prothiocarb, procymidone, vinclozolin, penconazole, myclobutanil, propamocarb, diconazole, pyrazophos, ethirimol, ditalimfos, tridemorph, triforine, nuarimol, triazbutyl, guazatine, triacetate salt of 1,1'-iminodi(octam
• the compounds of general formula (I) can be mixed with soil, peat or other rooting media for the protection of plants against seed-borne, soil-borne or foliar fungal diseases.
• Suitable insecticides which may be incorporated in the composition of the invention include pirimicarb, dimethoate, demeton-s-methyl, formothion, carbaryl, isoprocarb, XMC, BPMC, carbofuran, carbosulfan, diazinon, fenthion, fenitrothion, phenthoate, chlorpyrifos, isoxathion, propaphos, monocrotophas, buprofezir, ethroproxyfen and cycloprothrin.
• Plant growth regulating compounds are compounds which control weeds or seedhead formation, or selectively control the growth of less desirable plants (e.g. grasses).
• suitable plant growth regulating compounds for use with the invention compounds are the gibberellins (e.g. GA 3 , GA 4 or GA 7 ), the auxins (e.g. indoleacetic acid, indolebutyric acid, naphthoxyacetic acid or naphthylacetic acid), the cytokinins (e.g. kinetin, diphenylurea, benzimidazole, benzyladenine or benzylaminopurine), phenoxyacetic acids (e.g. 2,4-D or MCPA), substituted benzoic acids (e.g. triiodobenzoic acid), morphactins (e.g.
• gibberellins e.g. GA 3 , GA 4 or GA 7
• the auxins e.g. indoleacetic acid, indolebutyric acid, naphthoxyacetic acid or naphthylacetic acid
• the cytokinins e.g. kinetin
• chlorfluoroecol maleic hydrazide, glyphosate, glyphosine, long chain fatty alcohols and acids, dikegulac, paclobutrazol, flurprimidol, fluoridamid, mefluidide, substituted quaternary ammonium and phosphonium compounds (e.g.
• chloromequat chlorphonium or mepiquatchloride ethephon, carbetamide, methyl-3,6-dichloroanisate, daminozide, asulam, abscisic acid, isopyrimol, 1-(4-chlorophenyl)-4,6-dimethyl-2-oxo-1,2-dihydropyridine-3-carboxylic acid, hydroxybenzonitriles (e.g. bromoxynil), difenzoquat, benzoylprop-ethyl 3,6-dichloropicolinic acid, fenpentezol, inabenfide, triapenthenol and tecnazene.
• hydroxybenzonitriles e.g. bromoxynil
• difenzoquat benzoylprop-ethyl 3,6-dichloropicolinic acid
• fenpentezol inabenfide
• ether refers to diethyl ether
• magnesium sulphate was used to dry solutions, and reactions involving water-sensitive intermediates were performed under nitrogen and in dried solvents.
• chromatography was performed using silica gel as the stationary phase.
• infrared and nmr data are selective; no attempt is made to list every absorption.
• nmr spectra were recorded in deuterochloroform. The following abbreviations are used throughout:
• Methyl 3-thienylacetate was prepared by heating 3-thienylacetic acid in acidic methanol. It is an oil, 1H nmr:delta 3.71 (2H, s), 3.76 (3H, s) ppm.
• Powdered aluminium chloride (1.34 g) was added in portions to a stirred solution of (E)-methyl 3-methoxy-2-(3-thienyl)propenoate (1.00 g, prepared as described in Example 2) and benzoyl chloride (0.78 g) in dichloromethane (10 ml), cooled in an ice bath. Following the addition, the mixture was stirred at room temperature for 4 hours, then extracted with ether.
• n-Butyl-lithium (11.56 ml of a 2.5M solution in n-hexane) was added dropwise to a stirred solution of 3-(phenoxymethyl)thiophene (5.0 g) in THF (50 ml) at a temperature of about -70° C. Following the addition, the reaction mixture was allowed to warm to room temperature and stir for 1 hour. It was then added dropwise to a stirred solution of dimethyl oxalate (6.2 g) in THF (75 ml) at a temperature of about -10° C. The resulting mixture was stirred for 2 hours at room temperature, then poured into water and extracted with ether.
• Methyl (4-carboxy-3-thienyl)acetate was prepared from 4-bromothiophen-3-carboxylic acid and methyl acetoacetate by the method described by D E Ames and O Ribeiro, J.Chem.Soc., Perkin I, 1975, 1390, for the preparation of the corresponding ethyl ester. It is a solid which, after crystallisation from aqueous methanol, had mp 121°-122° C., 1 H nmr: delta 3.72 (3H, s), 3.95 (2H, s), 7.18(1H, d J 3 Hz), 8.27 (1H, d J 3 Hz) ppm.
• Triethylamine (0.34 ml) and trimethylsilyl triflate (0.47 ml) were added successively to a stirred solution of methyl [4-(prop-1-yloxycarbonyl)-3-thienyl]acetate (600 mg) in ether (7.5 ml), cooled to 0° C. The resulting mixture was stirred over-night at room temperature, during which time a red oil precipitated. The ethereal solution was decanted from this red oil to give ⁇ Solution A ⁇ .
• Titanium tetrachloride (0.27 ml) was added dropwise to a stirred solution of trimethylorthoformate (0.27 ml) in dichloromethane (10 ml), cooled to -70° C., to give a yellow suspension.
• ⁇ Solution A ⁇ was then added dropwise over 10 minutes with stirring to this suspension, cooled to -70° C.
• the resulting mixture was allowed to warm and was stirred at room temperature over-night, then was diluted with aqueous potassium carbonate and extracted with ether. The extracts were washed with water, dried and concentrated to give an orange oil (450 mg) consisting mainly of the title compound and the starting acetate (62% and 31% respectively by GC).
• the methyl (3-furyl)acetate was converted into the title compound in 2 steps as described in Example 2, that is (i) by reaction with sodium hydride and methyl formate, and (ii) treatment of the resulting formylacetate with potassium carbonate and dimethyl sulphate.
• the title compound a yellow oil, has IR (film) 1705, 1628 cm 31 1 and 1 H nmr as shown in Table VII.
• This alpha-ketoester was converted into the title compound (24% yield) using the phosphorane derived from (methoxymethyl)triphenylphosphonium chloride and potassium tert-butoxide under the conditions described in Example 5.
• the title compound is a solid, mp 72°-73° C., 1 H nmr: delta 2.94 (2H, t), 3.72 (3H, s), 3.86 (3H, s), 3.91 (2H, t), 6.06 (1H, m), 6.18 (1H, m), 6.64 (1H, m), 7.66 (1H, s) ppm.
• compositions suitable for agricultural and horticultural purposes which can be formulated from the compounds of the invention. Such compositions form another aspect of the invention. Percentages are by weight.
• An emulsifiable concentrate is made up by mixing and stirring the ingredients until all are dissolved.
• the active ingredient is dissolved in methylene dichloride and the resultant liquid sprayed on to the granules of attapulgite clay. The solvent is then allowed to evaporate to produce a granular composition.
• a dustable powder is prepared by grinding and mixing the active ingredient with talc.
• a suspension concentrate is prepared by ball milling the ingredients to form an aqueous suspension of the ground mixture with water.
• This formulation can be used as a spray by diluting into water or applied directly to seed.
• a wettable powder formulation is made by mixing together and grinding the ingredients until all are thoroughly mixed.
• the plants were grown in John Innes Potting Compost (No 1 or 2) in 4 cm diameter minipots.
• the test compounds were formulated either by bead milling with aqueous dispersol T or as a solution in acetone or acetone/ethanol which was diluted to the required concentration immediately before use.
• the formulations (100 ppm active ingredient) were sprayed on to the foliage and applied to the roots of the plants in the soil.
• the sprays were applied to maximum retention and the root drenches to a final concentration equivalent to approximately 40 ppm a.i./dry soil. Tween 20, to give a final concentration of 0.05%, was added when the sprays were applied to cereals.
• the compound was applied to the soil (roots) and to the foliage (by spraying) ore or two days before the plant was inoculated with the disease.
• An exception was the test on Erysiphe graminis in which the plants were inoculated 24 hours before treatment.
• Foliar pathogens were applied by spray as spore suspensions onto the leaves of test plants. After inoculation, the plants were put into an appropriate environment to allow infection to proceed and then incubated until the disease was ready for assessment. The period between inoculation and assessment varied from four to fourteen days according to the disease and environment.
• the disease control was recorded by the following grading:
• This Example illustrates the plant growth regulating properties of compound 1 of Table I, compounds 3 and 58 of Table IV, compounds 38 and 57 of Table V and compound 57 of Table VI.
• a formulation of each chemical was applied at 4000 ppm (4 kg/ha in a 1000 l/ha field volume) using a tracksprayer and a SS8004E (Teejet) nozzle. Additional tests were done on tomatoes at 2000 and 500 ppm.

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